Bubble pipe



FIG. 1 is a perspective view of a bubble pipe showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a cross-sectional view thereof taken along lines 5--5 in FIG. 3;

FIG. 6 is a perspective view of the nozzle insert member;

FIG. 7 is a modified embodiment of the nozzle insert member shown in FIG. 6;

FIG. 8 is a front elevational view thereof;

FIG. 9 is a side elevational view thereof;

FIG. 10 is a perspective view of a second modified embodiment of the nozzle insert member;

FIG. 11 is a front elevational view thereof;

FIG. 12 is a side elevational view thereof. 

The ornamental design for a bubble pipe, as shown and described. 